procedure TForm1.Button1Click(Sender: TObject);
var b,d:TStringList;i:Integer;s:String;
begin
if OpenDialog1.Execute then
begin
b:=TStringList.Create;
d:=TStringList.Create;
b.LoadFromFile(OpenDialog1.FileName);
for i:=0 to b.Count-1 do
begin
s:=b.Strings[i];
if i=2 then //指定行
s:='';
if s<>'' then
d.Add(s);
end;
d.SaveToFile(OpenDialog1.FileName+'1');
b.Free;
d.Free;
ShowMessage('ok!');
end;
end;